Oil-well pump



April 24. 1928.

W. D. OGLETREE 0 IL WELL PUMP Filed Oct. 11, 1922 Patented Apr. 24, 1928.

WILLIAM DAVID OGLETREE, F

MEXIA, TEXAS, .assrenon.

or oNn-rounrn 'ro 30m A. FAIN, or OKLAHOMA CITY, OKLAHOMA.

OIL-WELL PUMP.

Application filed October 11, 1922. Serial No; 593,925.

My invention relates to new and useful improvements in pumps and more particularly to an oil well pump, the principal object of the invention residing in the construction of the pump in such a manner that the usual oil well easing may be used as a working barrel and the tubing now commonly in use may be done away with. In carrying forward this object I construct the pump with three heads, the upper and lower heads being used for sealing purposes and the middle or central head being used as a piston or plunger, reciprocated between the upper and lower heads, to raise the oil, each of the heads being provided with valves to allow for the passage of the oil.

A further object of the invention consists in the provision of means for releasing all fluid weight from the pump when it is desired to raise the pump from the well or casing or. when inserting the pump therein, the valves of the several heads being so operated as to be opened when the pump is being withdrawn or inserted so that any fluid above the heads will pass therethrough to the bottom of the well and the only weight when raising or lowering the pump from the well or casing will be the actual weight of the pump itself. .1

A still further object of the invention resides in the formation of the pump so as to act as an agitator in the well causing a faster and greater flow of the oil from the well or sand from which the oil is drawn, the agitating also causing a. longer flow of the oil than would ordinarily be the case.

With the above and other objects in view, which will appear as the description proceeds, my invention consists in the novel details of construction and arrangement of parts described in the following specification and illustrated in the accompanying drawings, and while I have illustrated and described the preferred embodiments of the inventionas they now appear to me it will i be understood that such changes ma be made as'will fall within the scope o the appended claims. In the drawings:

a Fig. 1 is a transverse vertical section with parts shown in elevation.

Fig. 2 is a top lan of the upper head with the. polish rod s own in horizontal section.

Fig. 3 is a horizontal section on the line 3-3 of Fig. 1 looking in the direction of 4-4 of Fig. 1 looking in the direction of the arrows. Fig. 5 is a fragmental side elevation showmg the upper portion of the middle reciprocating head C.

Fig. 6 is a fragmental side elevation of the upper head A and its associated parts.

Fig. 7 is a horizontal section on the line 77 of Fig. 8 looking in the direction of the arrows, and

Fig. 8 is a side elevation of the lower head B,-parts shown in vertical section, and its associated parts.

. In the drawin s 1 indicates the upper p01- ish rod, to whic the usual operating cable or sucker rod will be fastened for operating the pump, the lower end of this rod 1 being screw threaded as shown at 1'. The lower polish rod is shown at 2 and is provided at its upper end with an interiorly threaded socket 2' to receive the lower end of the threaded portion 1' of the rod 1. It will thus be seen that the upper and lower polish rodsare connected. by athreaded joint so that ordinarily they will operate as a unit but they may be disconnected at will.

As stated in the objects of my invention the pump'comprises three separate and distinct heads, the upper head being indicated generally at A, the lower-head at B, and the middle'head, which is'mounted for reciprocation between the upper and lower heads at C. The upper and lower heads A and B are connected by the rods'3, these rods also acting-as a guide for the head 0. The uper head A comprises a central spool or rame portion 4 which has an outwardly extending flange 4' formed on its lower end to receive the rubber packing rlng 11, a plate or ring 5 being loosely mounted upon the spool or frame portion 4 and norma 1y resting upon the upper edge of the packm 11 as shown. The plate or ring 5 1s hel 111 position by means of the threaded ring 6 which engages a threaded portlon upon the spool or frame 4.. The weight of the fluid the same and cause it to engage the wall of p the well or casing to make a tight seal.

. surface of the check valves 7. Nuts 14 are to reciprocate.

Check valves 7 are carried by the head A and normally close the openings 7 which extend vertically through the head and their opening movement is limited by means of the transversely extending cross bar 8. The valves are connected to the head by means of the screws or pins 9 and the cross bars are connected to the head by means of the screws 10.

A cross bar or head 12 is slidably mounted upon the rods 3 and carries the trip rods 13 which pass through the spool or frame portion of the head A, as shown more particularly in Figs. 2, 3 and 6, and the upper ends thereof normally lie below the under carried by the trip rods 13 and normally engage the upper surface of the cross bar or head 12, the lower ends of the rods being -screw threaded into the cross head. The

trip rods are secured inposition by means of the plates or hangers 15, said plates or hangers being secured by means of the screws 16. A stufling box is shown at 1-7 and is provided with the usual form of stufling box cap 18. The spool or frame portion 4 of the head A, as quite clearly shown in Fig. 4, is provided with a central. bore through which the polish rod 1 is adapted The central or reciprocating head is of substantially the same construction as the head A. This head C consists of the body or spool portion 20 which is provided at its lower end with the outwardly extending flange 20 upon which the rubber packing ring or cylinder 11 is adapted to be seated. A ring or plate engages the upper end of this packing ring, the same as in the head A, and is held in position by the nut or ring 6. This central head is also rovided with the check valves 7 normally 0 osing the opening 7' in the head and connected to the same are the trips 19 which will be operated in a manner tobe later described. These trips 19 are .in the form of upwardly extending curved rods more clearly shown in Figs. 4 and 5. The spool or frame portion 20 is provided with a central threaded here to receive the threaded portion 1 of the polish rod 1 and by this threaded connection the central head C is connected to the polish rod and is adapted to reciprocate therewith.

This head C is provided with the stufling boxes 21 and caps 22 through which the brace rods 3 extend. as more clearly illus trated in Fig. 4 of the drawings. The lower head B is of substantially the same construction as the heads A and C consisting of the central spool or frame portion 23 having the outwardly extending flange 23' upon which the rubber acklng ring or cylinder" 11 will be receiv The head B is held menace upon the brace rods 3 by means of the nuts 24 and the cotter pins 25. Slidable on the polish rod 2 is a cross bar or head 26 to which trip rods 27 are secured in the same manner as the trip rods 13, said trip rods adapted to operate the check valve 7 ot' the lower head B in a manner which will be later described. Brace rods are indicated at 28 and are secured at their lower ends to From the above detail description it is thought that the construction of my improved form of pump will be clearly understood and I will now endeavor to more clearly bring out the operation thereof. As hasbeen prevlously stated the pump is adapted to be used in the oil well orcasing and is so constructed that the usual form of tubing will be done away with and the well or casing itself will act as a working barrel for the reciprocating head of the pump. When the pump is inserted in the well or casing the upper head A and the lower head B will act as a seal, the weight of the fluid upon the plates .or rings 5 thereof acting to press the rings or plates downwardly and to expand the rubber-rings or cylinders 11 into tight engagement with the wall of the well or the casing thereof. A cable or sucker rod is connected to the upper polish rod 1 and reciprocates the same in the usual manner. The head G will reciprocate with the polish rod 1 and be guided in its movement bymeans of the rods 3. The check valves 7 of the lowermost head B will be thrown open upon the upper movement of the head C .to draw the oil or other fluid therethrough and, of course, on the upward movement of the head 0 the check valves 7 carried thereby will be closed to hold the fluid, above the head G thereon. As the head C moves upwardly the valves 7 of the head A open and the oil or other fluid will be discharged therethrough.- On the downward movement of the head C the check valves 7 carried by the head A will be closed and support the fluid thereon and the valves 7 carried by the head 0 will open and allow the oil or other fluid which has been drawn above the head B upon upward movement of the head C to pass therethrough to a point above the head C. It will, of course, be understood that upon the downward movement of the head C the check valves 7 carried by the head B will be closed.

rod 2 will engage the under-face of the cross head or bar 26 and thereby raise the same.

. This movement will cause the lower trip rods uid above the heads to engage and open the check valves 7 of the head B. The nut 29 will limit the downward movement of the cross head 26'. As the head C is raised the valve trips 19 will engage the under face of the cross head 12 and thereby open the check valves 7 which are carried by the head C. In its upper .movement the head C will engage the cross bar or head 12 and through means of the trip rods 13 open the check valves 7 carried by the upper head A. It will thus be seen that when it is desired to remove the pump from the well that the check Valves 7 carried by the several heads will be opened so that any liqwill pass therethrough, to the lower end of the well, and no fluid we ght will be added to the pump. The only weight in withdrawing the pump from the well 'Will be the actual weight of the pump parts. The valves will also be held openin the manner described when inserting the pump into the Well.

I claim:

A pump of the characterdescribed compris ng upper and lower heads, means connecting said heads, and a movable head operable upon the connecting means between the first mentioned heads.

g. A pump of the character described comprlsmg upper and lower heads, rods connectlngsald heads, a head slidably mounted upon the rods between the first mentioned heads, and means for operating the slidable head.

3. pump for wells or the like comprising upper and lower heads, a head operable be tween the first mentioned heads. valves carried by each of the heads, and means for opening the valves upon movement of the pump as a unit relative to the well.

A pump of the character described comprising an upper and a lower head. means connecting said heads, a movable head slidable upon the connecting means, and means connected to the movable head and operable through the upper and lo'wer heads for imparting movement to the movable head.

5. A pump of the character described comprising upper and lower heads, rods connecting said heads, a movable head slidably mounted upon the. rods and operable between the first mentioned heads, valves carried by each of'the heads, means connected to the movable head for imparting movement thereto, means operable by the operating means for operating the valves. of the lower head, means carried by the movable head and engaged during the upward movement i heads being normally through the heads,

opened automatically when thereof for opening the valves of the movable head, and means operable by the mov-' able head for opening the valves of the upper head.

6. A. pump for wells or'the like comprising an upper and a lower head, each having a passage theret-hrough and a valve for opening and closing such passages, an intermediate head operable between the first mentioned heads, said intermediate head having a passage theretln'ough and a valve for opening and closing said passage, the valves of the several heads being opened by pressure when the heads are being inserted in the well, and means controlled by the movement of the intermediate head for opening the valves as the heads are being withdrawn from the well.

7. A pump of the character described comprising upper and lower heads each having an opening therethrough, valves 'for controlling passage through the openings, amovable head operable between the upper and lower heads and having an opening therethrough, a valve, for cont-rolling passage through the opening in the movable head, the opening and closing of the valves of the eration of the movable head, and means whereby the valves will be opened as the pump is moved as a unit.

8. A pump of the character described comprising upper and lower heads each having an opening therethrough, valves for controllin passage through said openings, a rod slidable through said, heads, an intermediate head connected to said slidable rod and operable therewith between the upper and lower heads, said intermediate head having an opening therethrou h and a valve for controlling passage throug hthe opening, the valves being normally operated upon movement of the intermediate head, means extending through the lower head and operable upon the 'upward movement of the slidable rod for opening the valve in the lower head,vmeans extending through the upper -head and operable by the upward movement of the slidable rod for opening the valve of the upper head, and means connected to the valve of the intermediate head and operable upon the movement of said head in an up ward direction to open the valve of the intermediate head.

9. A pump of the character described including a barrel, upper and lower heads received in the barrel having passages therethrough, valves for controlling the passages a plunger operable in the barrel between the heads, said plunger having passages therethrough, a valve for controlling the passages in the plunger, the

valves of the heads and plunger being inserting the barrel into the well, and means for opening controlled by the oploo U 5 eluding a barrel, upper and lower heads received in the barrel and having passages therethrough, valves for controlling the pasmeme sages through the heads, a, plunger rod slidable relative to the barrel, a plunger carried by the plunger rod and operable between the w heads, and means operable by the movement of the plunger rod for opening the valves of the heads.

'WILLIAM DAVID OGLETREE. 

